Novak Djokovic failed to train hard enough and will not regain the top world ranking unless he "puts in the hours", former coach Boris Becker says, after the pair split. Djokovic has won 12 Grand Slam titles -- six under Becker -- but on Tuesday the Serb confirmed rumours that he and the German legend had parted ways after three years together. "He has not spent as much time on the practice court as he should have in the last six months and he knows that," Becker, 49, told Sky Sports News.

Kiki Bertens fell to Kirsten Flipkens in unfortunate fashion over the weekend when, on match point, the ball hit her in the head on her own serve. Playing in the International Premier Tennis League (IPTL), Bertens found herself with second serve down 6-3 in a second set tiebreaker. This, then, meant that Bertens had no choice but to try to serve despite her poor toss.

Controversial courtside ads for UK bookmaker William Hill have been dumped from next month's Australian Open tennis tournament. Tennis Australia confirmed on Friday it would no longer offer "on-court signage" to the betting agency. The ads were criticised in January after the BBC and BuzzFeed revealed evidence of widespread match-fixing at the top level of world tennis. William Hill was not implicated in the match-fixing allegations. However, the scandal renewed criticism of the betting agency's deal in 2015 to become the Australian Open's "official betting partner". Anti-gambling campaigners said the agreement represented a problematic deepening of ties between large bookmakers and the sport.